I think he's using "split system" to describe running cable stops. The cable housing is split. One run of housing from lever to frame another run of housing from frame to caliper, bare cable between cable stops.

I like the jagwire converters mentioned by mechbegone

If you don't want to wait for an AEBike shipment, since you've hydro clips I'd probably go for the 2nd option FB mentions. You put the cable in the cable guides then put zip ties around to keep the cable in there. Actually I might try the electrical tape option. Put enough wraps of tape around the housing in the guide area so that it clips firmly into the guide. Looks cleaner than zip-ties but not as solid, as if/when you turn your bars too far or just happen to snag housing on something the housing might unclip.